Undertale, Battle Against A True Hero, and Undyne the Undying are owned by Toby Fox
Link of original music Battle Against A True Hero: ua-cam.com/video/aWBtpBwzzdM/v-deo.html
[Undertale_Hard Mode] Battle Against A True Hero (Phase 2) is owned by Moon Striker
Link of owner [Undertale_Hard Mode] Battle Against A True Hero (Phase 2):
1. Soundcloud: m.soundcloud.com/moonstrikefour
2. UA-cam: ua-cam.com/users/MoonStriker
Link of original music [Undertale_Hard Mode] Battle Against A True Hero (Phase 2): m.soundcloud.com/moonstrikefour/hardmode-baath-2
Undyne the Undying sprite by Toby Fox
Title Logo of Undertale Hard Mode by Toby Fox
Sprite and all original soundtrack in this video, they are belong to their owner.
Leitmotif of this part that I got:
Spear of Justice
Battle Against A True Hero
Waterfall / Another Medium
Alternative Title from myself: The Last Stand of the Undying / The Last Stand of the True Hero
I hope you enjoy this video. ^_^
And there is one of Battle Against A True Hero Remix that maybe you will like it: ua-cam.com/video/PwQsoDCCGBc/v-deo.html